.container {
    margin: 0 auto;
    width: 60%;
    height: 100vh;
}
.container h1 {
    /*margin: 0 auto;*/
    text-align: center;
}
.container .mytable thead th:nth-child(odd){
    background-color: #4fc3a1;
    color: white;
}
.container .mytable thead th:nth-child(even){
    background-color: #324960;
    color: white;
}